Protector mechanism for looms



Patented July 26, 1 932 LAN'IA, GEORGIA I a p k r BENJAMAN W. BROWN, OFHAPEVILLE; GEORGIA, ASSIGNOR OFyONE-HALF TO JAMES CHAPMAN AND ONE-FOURTHLAURA EMILY; SCOTT CHAPMAN, BOTH, "AT

rno'rnoiron MECHANISM non -iLooMs I I Application filed Janelle; 1930No. 462,042.

My saidinvention relates to an improvement 1n protector mechanism forlooms and; it is an ob ectof the lnvention to. remove from the shuttleas it enters and leaves the shuttle boX substantially all that springpressure which has heretofore been placed on it by theprotector'mechanism commonly'in use. By removingwthe principal part ofsuch spring pressure the shuttle entersand leaves) thexshut-tle boxesonly against ve'rylightipresi sure, the protector rod remaining dormantuntil ]l1Sl3 before the protector dagger reaches the knock-off or slamsteel when it is raised mechanically without j ar or Vibration s0 as topass overqor under the knock-off as the cause bursting out of thepickers on the picker sticks as p the shuttle is not driven so-hard andavoids" strain on the picker sticks, lug straps and picklevers as theshuttle 1s never under severespring pressure. My construction preventsthe shuttle walls from being sprung asthe shuttle enters andleaves theboxand prevents shuttles from cracking at each end of the shuttle walls.It permits the shuttle boxes to beset up on a straight'line either on aback 7 binder loom or on a front binder loom, thereby preventingshuttles from slapping when going into'the boxes. It alsocauses the shut'tles to emerge from theboxes in'astraightline thereby doing away withthe zigzag. movementofthe shuttle in its fli ht across the lay known assnaking shuttle. It willbe understood that the shuttle must be keptfromrebounding after it enters thebo'Xe's andthis is taken care of by" theslight pressure of the" binder; the shuttle beingvpicked more lightly,

a very light protectionspring pressure is sufficient to preventrebounding. All thepower requiredfrom "the pick mechanism" is that"necessary to throw the shuttle across thelay and the heavy pickingnecessary ordinarily to box the-shuttle in a tightboxis done: away with(as welljas the consequentvibration) this making for a great saving inpower.

'Another object of the invention is to pro-' vide adj usting'meanswhereby the operation of the protection rod may be set preciselyfor any desired time so as to operate the protecttion rod only at suchtimeland through mechanical means controlled by the proper boxingo'f theshuttle but notdirectly actuated by force derived from the flight oftheshuttle. Such means may be simple andpositive mechanicalmeans addingvery littleto the cost of the loom onto; the upkeep, particularlywhencompared 'w1th the relativelydelicate and expensive shuttle and shuttlebox mechanism. I" p Referring to the drawing which is-made a p'artofthis application and in which similar reference characters indicatesimilar parts, 7 a Fig. 1 is a fragmentary front elevation of the layand associatedjparts;

2a a I f agmentary ti of Fig. 1,;

.Fig. 3 is tai section online 3- 3'of'Fig. 1,

and

Fig. 4, a modification."

In the drawing reference character 10 indlcates one side member of alooml frame on which the rocker shaft 11 for the lay 12is supportedythelay 'beingmounted on the rocketshaft by lay swords 13 as usual and beingoperatedby a crank shaft 14' and link 15 in wellrknown manneri said layhaving associated therewith areed 1'6, reed cap 17 and shuttleboxes-18rand 19 (Figs. 2 and 3); all of whichare or maybe substantially ofany conventional or desirable type. A pick shaft20 of ordinary type isalso shown as being supported by the frame "of theloom, said shaftbeingdriven by the crank shaft in the usual two and one speed relation,

The shuttleboxes are each-"supplied at theirforward side? withsh'uttlebinders 21 on rin e-2.-

pivoted at -22; {These shuttle binders serve,

as usual in the art, to retard the shuttle, indicated diagrammaticallyat 23,; as it enters the shuttle. box to prevent rebounding and toc'ontrohthe operation" of. the protector mechanism." The shuttle bindersare forced lightly inward toward the lshuttle by light flat springs 2 Lprovided at their inner ends -with sockets" 25 for receiving the upperends of protector fingers 26 which are pivotally mounted on rock arms 27adjustably secured to the protector rod 28 by means of set screws 29.This protector rod also carries a dagger 30 as shown in Fig. 1. It willbe understood that the spring 24: may be separate from the socket Theprotector rod is mounted for oscillatory movement and is biased formovement in a conntercloclnvise direction by means of a spring 31 asusual in such de vices. This spring may be set at one uniform and verylight pressure as it has only to hold the protection rod in normalposition against the weight of finger 26, etc., and does not reactagainst the pressure of the shuttle in the shuttle box.

Levers 32 are here shown as being pivotally mounted on the lay and eachof said levers is connected at its free end to a link 34: having ahooked end entering an aperture in the lever. At their lower ends thelinks 3st are connected to levers 35 having removable cams at 36 adaptedto be acted on by wrist pins 37 on cams 38. These cams may be the usualpick cams or additional cams on the pick cam shaft or they may be camson a shaft other than the pick cam sha t, according to the type of loomand the other exigencies of the situation.

In the use of my invention the shuttles are picked across the fell ofthe forming cloth as usual from one shuttle box to the other. Theshuttle binders are held lightly so as to be slightly in the path of theshuttles so as to check but very little the movement of the shuttle andto retard it sufficiently to prevent its rebounding out of the box. Aproperly boxed shuttle swings the binder back slightly about its pivot22 against the tension of spring 24 or equivalent means. This causes thefinger 26 to swing to the right about its pivot on rock arm 27 so as tobring a lug 40 on the finger into the path of movement of the lever 32.It will be understood that the distance between lever 32 and finger 26is considerably exaggerated for clear disclosure. This lever being movedin timed relation with the picks of the shuttle and the movements of thelay will now pull down on the finger 26 and turn the protector rod 28just in time to prevent the dagger 30 from striking a knock-off lever orequivalent device, which may be such as is illustrated in the patent toMcMichael 1,495,606 or may be of any other suitable type. If the shuttleis not properly boxed the binder will not be forced back and theprotection finger will remain in a position to the left of thatindicated in Fig. 3 so that the lever 32 will not strike the lug 40.This therefore leaves the protector rod in normal position where thedagger will strike a knock-off lever or the like, thus stopping theloom.

The set screw 29 provides for adjustment of the rock arm 27 about therod 28 to any desired position so as to bring the lug 40 to the desiredheight relative to lever 32 for swinging the rod 28 to the extentdesired and at the proper time. A further adjustment may be had at thepivot 40 of lever 35 by means of an eccentric pivot 41 shown in Fig. 2,or other suitable means, and the length of rod 3% may also be changed byturnbuckle 3% for like purposes.

In Fig. 4: I have shown a slight variation of my device whereby thefinger 26 is mounted for oscillation about a pin 43 on the rock arm 23and is normally held in the illustrated position by means of a coilspring 42. The purpose of this construction is to prevent any breakageof the shuttle, the binder or other parts in case a shuttle should stickin the shuttle box, in which case the spring will permit the finger toyield at its lower end by moving to the left in Fig. a.

It will be obvious to those skilled in the art that numerous changes maybe made in my device without departing from the spirit of the inventionand therefore I do not limit myself to what is shown in the drawing anddescribed in the specification but only as indicated in the appendedclaims. For example it will be obvious in applying my device to a backbinder loom that the parts will have to be supported in slightlydifferent manner. Again in applying it to a Draper loom the shape of thelever 35 will have to be changed, but all such minor mechanicalvariations are regarded as being within the skill of the ordinarymechanic skilled in this art and are therefore not illustrated in thedrawing. It should be understood as to the shuttle binders and as toother parts not specifically described as new that these parts may be ofany conventional or desirable character as found in commercial looms.

Having thus fully described my said invention, what I claim as new anddesire to secure by Letters Patent is:

1. In a loom having a lay and protector mechanism including anoscillatory protector rod and a dagger fixed to the rod, the combinationof a shuttle box, a shuttle binder for said box, a rock arm fixed to theprotector rod, a protector finger pivoted on said rock arm said fingerhaving a lug and being connected to the shuttle binder for oscillationabout its pivot on the rock arm, a lever pivoted on the lay, and meansfor oscillating said lever in timed relation with the movement of thelug to engage it with said lug if the shuttle is properly boxed therebypreventing operation of the protector mechanism to stop the loom,substantially as set forth.

2. In a. loom having a lay and protector VII said box, a pivoted lever,means for moving said lever in timed relation to the movements of thelay, a rock arm fixed to the protector rod, a protector finger pivotedon the rock arm said finger being moved outward by the shuttle binderupon'boxing of the shuttle, and means whereby said pivoted lever acts onthe protector mechanism through i said protector finger and rock arm toturn the protector rod and so prevent knockingotl when the shuttle isproperly boxed,,substantially as set forth. p

3. In a loom having a lay and protector mechanism including anoscillatory protector rodand a dagger fixed to therod, the combinationof a shuttle box, a shuttle binder for said box, a rock arm fixedto theprotector rod, a protector finger pivoted on said rock arm, saidprotective finger being connected to the shuttle binder for oscillationthereby, and means controlled by the positionof the shuttle binder foroperating on the protector mechanism through said finger at each pick ofthe shuttle if the shuttle is properly boxed so as to preventknocking-ofi' of the loom,

substantially as set forth.

4. In a loom having a lay and protector mechanism including anoscillatory protector rod and a dagger fixed to the rod, the combinationof a shuttle box rock arm fixed to the protector rod, a shuttle binderfor said box, a rock arm fixed to the protector rod, a protectorfingerconnected to theshuttle binder to be positioned thereby said fingerbeing loosely pivoted on said rock arm, and means for acting on saidfinger, at each pick of the shuttle if the shuttle is properly boxed soas to rock said protector rod and prevent knocking-off of the loom,substantially as set 40 forth. i

5. In a loom having a lay and protector mechanism including anoscillatory protector rod and a dagger fixed to the rod, the combinationof a shuttle box, a shuttle binder for said box, a rock arm fixed to theprotector rod, a protector finger pivoted on said rock arm, said rockarm being connected to the shuttle binder for oscillation thereby, andpower-. operated means for oscillating the protector rod to preventknocking-oil of the loom, said means acting after said finger has beenswung out due to proper boxing of the shuttle,'substantially as setforth.

In testimony whereof I afiix my signature.

BENJAMAN W. BROWN.

